San Francisco may soon get 24/7 driverless cabs. City leaders are fuming.

Though neither company would say exactly how many cars are on the city's streets, they have become a ubiquitous presence in San Francisco as the state gradually lifts restrictions. Cruise currently has a permit to charge for driverless passenger pickups and drop-offs in limited areas of the city from 10 p.m. to 6 a.m. The company also can offer free passenger service throughout the city at any time of day, with or without a safety driver. Waymo can charge for its rides throughout San Francisco with a safety driver present, and can offer fully autonomous pickup and drop-off if the ride is free.